in reply to
Re^2: Difference Between use warnings and use warnings FATAL => 'all'
in thread Difference Between use warnings and use warnings FATAL => 'all'
gcc -ansi -pedantic -Wall -Wextra ...
No, it's worse:
gcc <various-warning-flags> -Wfatal-errors
i.e. it stops at the first warning. In practice, this means that you get to fix/suppress the first warning your program causes, then start it over again to fix/suppress the second, etc., rather than getting a list of all of them and deciding what to do.